Tripping mechanism for binder attachments



March 12, 1929. a. w. WITTE TRIPPING MECHANISM FOR BINDER ATTACHMENTS Filed Jan. 10, 1924v Patented Mar. 12, 192,9.

UN'I TEDfST ATE S 1,705,322 PATENT OFF-ICE.

GUSTAV w. WITTE, or CHICAGO, ILLINOIS, nssre'non r o INTERNATIGNAL nanvns'rna compan or CHICAGO, LInoIs, A oon r'onn'rron or new JEnsnY.

TRIPPING MECHANISM ron nInn-nnarrnonnnn'rs.

Application filed January 10, 1924. Serial No. 685,859.

This invention relates to binding mechanisms for grain binders and the like, and particularly to clutch trrppmgand compressor mechanisms therefor.

'tension devices of uniform strength, and

sometimes after usage to the wearing of certain parts, these operative connections between the shafts mentioned develop a looseness or lost motion wit-h a consequent unde- 7 sirable rattling and chattering of the parts.

The greatest disadvantage of this looseness. however, lies in the formation of bundles varying in size due to the irregular operation of the tripping and compressor mechanism.

The object of the invention is to improve the binding mechanism of a grain binder or like machine, and especially thetripping and. compressing device thereof, in such a'manner that improved bundles of uniform" size are formed. This is accomplished by the provision of an improved take-up or adjusting device, easily and quickly adjustable to compensate for any lost motion between the parts and thereby insure the proper operation of the tripping mechanism.

Another object is to improve generally the construction and operation of devices of this character.

The embodiment of the invention chosen for purposes of illustration is shown in the accompanying sheet of drawings, wherein' Fig. 1 is a front end elevation of a binder mechanism equipped with the improved adjusting device;

Fig. 2 is a fragmentary view similar to Fig. 1 but showing the parts in a. slightly different operative position;

Fig. 3 is an enlarged detail view showing the adjusting device; and

Fig. 4 is a detail view showing the parts where wear is most likely to occur.

The binder shown is of standard construction and comprises a binder frame 10 disposed adjacent the binder deck 11, the binding mechanism thereof (not shown) being controlled by a rotatable clutch dog 12 operable from the packer shaft 13, the dog inturn being governed in its operation by a stop link or member 14. -This stop member is fixed on the shaft 15 which carries adjacent its farther end a bracket 16 supporting the usual compressor trip 17, the latter extending upwardly intothe path of the grain passing over the binder deck 11 in a well known manner. A crank 18 integral with one end of the needle shaft 19 is connected by means of atrip rod or link 20 wit-h a r0 tatable cam wheel 21 keyed to the knotter shaft 22, and a" cam wheel crank or level 23 pivoted at 2 1 to the frame 10 contacts atone the rod is slidably mounted. The housing encloses the compression spring 29, the ten: S1011 of which may be Varied by means of the ad usting nut 30 to controlthe operation of the compressor trip 17 and thereby regulate the size of the bundles produced. This compression spring by exerting a pull on the end of the lever 23 also serves constantly to urge the cam roller to duty on the cam surface 26.

When the clutch dog 12 is abutting against the stop link 1 1 the compressortrip 17 is in position to receive and support an accumula tion of grain moving to it from "the binder deck. Gradually the pressure of the grain increases and against the tension of the spring 29 moves the trip outwardly and downwardly. Because the stop member 14 is keyed to the same shaft which carries the trip, the stop is moved out of engagement with the dog 12. The packer shaft 13 now drives the cam wheel 21 through the gearing 31 and 32 and through the rod 20, and crank 18 imparts a part rotation or rocking movement to the needle shaft 19 to'operate the needle, not shown. This shaft is provided with a cam collar 33 which functions once on every such rotation to hold the stop memher 1 1 in a raised position away from the clutch dog. At this time, of course, the cam roller is traveling the low part of the cam and the compressor trip moves still farther downwardly and drops below the binder deck to permit discharge of the tied bundle. Due to the hammering of the clutch dog on the end of the stop link 14 and the wear which takes place at this point, it is desirable to provide an adjustable abutment for the end of this link. 'Accordingly a headed screw bolt 34 is fitted for adjustment into the end of the link where it functions to take up wear at this point.

The great difliculty heretofore, however, has been to keep the cam roller home on the cam track 26. This was due mainly to a weakening of the compression spring 29 after use, or a slight disarrangement of the three shafts, but particularly to the wear on the stop member 14 because of the rubbing of the cam 33. Anyone of the things just specified, but especially the latter, will cause lost mot-ion between the parts and an undesirable rattling and chattering. The main object of the invention was to overcome this.

The upper, inner end of the spring case 28 is accordingly provided with an integral boss or extension 35 which is hollowed out and tapped to receive a headed screw bolt 36. Bymeans of the head on this bolt it may be moved into engagement with the lever 23 and thus assist to hold thecam roller in close .contact with the cam surface on the cam wheel 21. A lock nut 37 is provided to securely lock the bolt in adjusted position. When the parts are properly adjusted and there is no looseness or lost motion, the cam roller will always be heldto duty on the cam surface with the single exception shown in Fig. 2 when the roller is momentarily on the highest point of the cam surface. If wear occurs, all that is necessary to do is to loosen ,the nut 37 and turn the bolt 36 in such a direction that it will be moved downwardly until the parts are once more secure. This adjustment then obviously permits the compression spring 29 to properlyperform its duty of holding the cam roller home even though wear should occur.

The operation and use of the invention will be apparent from the above description and a further description is deemed unnecessary.

It is to be understood that the invention is not to be limited to the specific form shown herein, but may be modified to assume other forms without departing from its spirit, the intention being to include all such forms of the invention within the scope of the ap pended claims.

What I claim is:

. 1. In a binder mechanism for grain binders or the like, the combination of a frame,

ers or the like, the combination of a frame,

a plurality of rotatable shafts carried in the frame, a cam on one of the shafts, a lever pivoted to the frame intermediate its ends and carrying a roller at one end,tension means including a housing operatively connecting the other end of said lever to another of the shafts, a bored extension carried on the housing, and a bolt threaded in said extension for adjustment therein, whereby one end of said bolt may pressthe lever to regulate the action of the tension means for pressing the roller against the cam. v In testimony whereof I affix my signature.

GUSTAV W. WITTE. 

